The abstract base class for all 'terminal' processing blocks.A signal processing flow is constructed by creating a tree of hierarchical blocks, which at any level may also contain terminal nodes that actually implement signal processing functions. This is the base class for all such leaf nodes. More...

#include <block.h>

Inherits gr::basic_block.

List of all members.

Public Types
enum	{ WORK_CALLED_PRODUCE = -2, WORK_DONE = -1 }
	Magic return values from general_work. More...
enum	tag_propagation_policy_t { TPP_DONT = 0, TPP_ALL_TO_ALL = 1, TPP_ONE_TO_ONE = 2 }
Public Member Functions
virtual	~block ()
unsigned	history () const
void	set_history (unsigned history)
bool	fixed_rate () const
	Return true if this block has a fixed input to output rate.
virtual void	forecast (int noutput_items, gr_vector_int &ninput_items_required)
	Estimate input requirements given output request.
virtual int	general_work (int noutput_items, gr_vector_int &ninput_items, gr_vector_const_void_star &input_items, gr_vector_void_star &output_items)
	compute output items from input items
virtual bool	start ()
	Called to enable drivers, etc for i/o devices.
virtual bool	stop ()
	Called to disable drivers, etc for i/o devices.
void	set_output_multiple (int multiple)
	Constrain the noutput_items argument passed to forecast and general_work.
int	output_multiple () const
bool	output_multiple_set () const
void	set_alignment (int multiple)
	Constrains buffers to work on a set item alignment (for SIMD)
int	alignment () const
void	set_unaligned (int na)
int	unaligned () const
void	set_is_unaligned (bool u)
bool	is_unaligned () const
void	consume (int which_input, int how_many_items)
	Tell the scheduler `how_many_items` of input stream `which_input` were consumed.
void	consume_each (int how_many_items)
	Tell the scheduler `how_many_items` were consumed on each input stream.
void	produce (int which_output, int how_many_items)
	Tell the scheduler `how_many_items` were produced on output stream `which_output`.
void	set_relative_rate (double relative_rate)
	Set the approximate output rate / input rate.
double	relative_rate () const
	return the approximate output rate / input rate
virtual int	fixed_rate_ninput_to_noutput (int ninput)
	Given ninput samples, return number of output samples that will be produced. N.B. this is only defined if fixed_rate returns true. Generally speaking, you don't need to override this.
virtual int	fixed_rate_noutput_to_ninput (int noutput)
	Given noutput samples, return number of input samples required to produce noutput. N.B. this is only defined if fixed_rate returns true. Generally speaking, you don't need to override this.
uint64_t	nitems_read (unsigned int which_input)
	Return the number of items read on input stream which_input.
uint64_t	nitems_written (unsigned int which_output)
	Return the number of items written on output stream which_output.
tag_propagation_policy_t	tag_propagation_policy ()
	Asks for the policy used by the scheduler to moved tags downstream.
void	set_tag_propagation_policy (tag_propagation_policy_t p)
	Set the policy by the scheduler to determine how tags are moved downstream.
int	min_noutput_items () const
	Return the minimum number of output items this block can produce during a call to work.
void	set_min_noutput_items (int m)
	Set the minimum number of output items this block can produce during a call to work.
int	max_noutput_items ()
	Return the maximum number of output items this block will handle during a call to work.
void	set_max_noutput_items (int m)
	Set the maximum number of output items this block will handle during a call to work.
void	unset_max_noutput_items ()
	Clear the switch for using the max_noutput_items value of this block.
bool	is_set_max_noutput_items ()
	Ask the block if the flag is or is not set to use the internal value of max_noutput_items during a call to work.
void	expand_minmax_buffer (int port)
long	max_output_buffer (size_t i)
	Returns max buffer size on output port `i`.
void	set_max_output_buffer (long max_output_buffer)
	Sets max buffer size on all output ports.
void	set_max_output_buffer (int port, long max_output_buffer)
	Sets max buffer size on output port `port`.
long	min_output_buffer (size_t i)
	Returns min buffer size on output port `i`.
void	set_min_output_buffer (long min_output_buffer)
	Sets min buffer size on all output ports.
void	set_min_output_buffer (int port, long min_output_buffer)
	Sets min buffer size on output port `port`.
float	pc_noutput_items ()
	Gets instantaneous noutput_items performance counter.
float	pc_noutput_items_avg ()
	Gets average noutput_items performance counter.
float	pc_noutput_items_var ()
	Gets variance of noutput_items performance counter.
float	pc_nproduced ()
	Gets instantaneous num items produced performance counter.
float	pc_nproduced_avg ()
	Gets average num items produced performance counter.
float	pc_nproduced_var ()
	Gets variance of num items produced performance counter.
float	pc_input_buffers_full (int which)
	Gets instantaneous fullness of `which` input buffer.
float	pc_input_buffers_full_avg (int which)
	Gets average fullness of `which` input buffer.
float	pc_input_buffers_full_var (int which)
	Gets variance of fullness of `which` input buffer.
std::vector< float >	pc_input_buffers_full ()
	Gets instantaneous fullness of all input buffers.
std::vector< float >	pc_input_buffers_full_avg ()
	Gets average fullness of all input buffers.
std::vector< float >	pc_input_buffers_full_var ()
	Gets variance of fullness of all input buffers.
float	pc_output_buffers_full (int which)
	Gets instantaneous fullness of `which` input buffer.
float	pc_output_buffers_full_avg (int which)
	Gets average fullness of `which` input buffer.
float	pc_output_buffers_full_var (int which)
	Gets variance of fullness of `which` input buffer.
std::vector< float >	pc_output_buffers_full ()
	Gets instantaneous fullness of all output buffers.
std::vector< float >	pc_output_buffers_full_avg ()
	Gets average fullness of all output buffers.
std::vector< float >	pc_output_buffers_full_var ()
	Gets variance of fullness of all output buffers.
float	pc_work_time ()
	Gets instantaneous clock cycles spent in work.
float	pc_work_time_avg ()
	Gets average clock cycles spent in work.
float	pc_work_time_var ()
	Gets average clock cycles spent in work.
void	reset_perf_counters ()
	Resets the performance counters.
void	setup_pc_rpc ()
	Sets up export of perf. counters to ControlPort. Only called by the scheduler.
bool	is_pc_rpc_set ()
	Checks if this block is already exporting perf. counters to ControlPort.
void	no_pc_rpc ()
	If the block calls this in its constructor, it's perf. counters will not be exported.
void	set_processor_affinity (const std::vector< int > &mask)
	Set the thread's affinity to processor core `n`.
void	unset_processor_affinity ()
	Remove processor affinity to a specific core.
std::vector< int >	processor_affinity ()
	Get the current processor affinity.
int	active_thread_priority ()
	Get the current thread priority in use.
int	thread_priority ()
	Get the current thread priority stored.
int	set_thread_priority (int priority)
	Set the current thread priority.
block_detail_sptr	detail () const
void	set_detail (block_detail_sptr detail)
Protected Member Functions
	block (void)
	block (const std::string &name, gr::io_signature::sptr input_signature, gr::io_signature::sptr output_signature)
void	set_fixed_rate (bool fixed_rate)
void	add_item_tag (unsigned int which_output, uint64_t abs_offset, const pmt::pmt_t &key, const pmt::pmt_t &value, const pmt::pmt_t &srcid=pmt::PMT_F)
	Adds a new tag onto the given output buffer.
void	add_item_tag (unsigned int which_output, const tag_t &tag)
	Adds a new tag onto the given output buffer.
void	remove_item_tag (unsigned int which_input, uint64_t abs_offset, const pmt::pmt_t &key, const pmt::pmt_t &value, const pmt::pmt_t &srcid=pmt::PMT_F)
	Removes a tag from the given input buffer.
void	remove_item_tag (unsigned int which_input, const tag_t &tag)
	Removes a tag from the given input buffer.
void	get_tags_in_range (std::vector< tag_t > &v, unsigned int which_input, uint64_t abs_start, uint64_t abs_end)
	Given a [start,end), returns a vector of all tags in the range.
void	get_tags_in_range (std::vector< tag_t > &v, unsigned int which_input, uint64_t abs_start, uint64_t abs_end, const pmt::pmt_t &key)
	Given a [start,end), returns a vector of all tags in the range with a given key.
Protected Attributes
std::vector< long >	d_max_output_buffer
std::vector< long >	d_min_output_buffer
gr::thread::mutex	d_setlock
gr::logger_ptr	d_logger
gr::logger_ptr	d_debug_logger

Detailed Description

The abstract base class for all 'terminal' processing blocks.

A signal processing flow is constructed by creating a tree of hierarchical blocks, which at any level may also contain terminal nodes that actually implement signal processing functions. This is the base class for all such leaf nodes.

Blocks have a set of input streams and output streams. The input_signature and output_signature define the number of input streams and output streams respectively, and the type of the data items in each stream.

Although blocks may consume data on each input stream at a different rate, all outputs streams must produce data at the same rate. That rate may be different from any of the input rates.

User derived blocks override two methods, forecast and general_work, to implement their signal processing behavior. forecast is called by the system scheduler to determine how many items are required on each input stream in order to produce a given number of output items.

general_work is called to perform the signal processing in the block. It reads the input items and writes the output items.

Member Enumeration Documentation

anonymous enum

Magic return values from general_work.

Enumerator:

WORK_CALLED_PRODUCE
WORK_DONE

enum gr::block::tag_propagation_policy_t

Enumerator:

TPP_DONT
TPP_ALL_TO_ALL
TPP_ONE_TO_ONE

Constructor & Destructor Documentation

virtual gr::block::~block ( ) [virtual]

gr::block::block ( void ) [inline, protected]

gr::block::block	(	const std::string &	name,
		gr::io_signature::sptr	input_signature,
		gr::io_signature::sptr	output_signature
	)		`[protected]`

Member Function Documentation

int gr::block::active_thread_priority ( )

Get the current thread priority in use.

void gr::block::add_item_tag	(	unsigned int	which_output,
		uint64_t	abs_offset,
		const pmt::pmt_t &	key,
		const pmt::pmt_t &	value,
		const pmt::pmt_t &	srcid = `pmt::PMT_F`
	)		`[inline, protected]`

Adds a new tag onto the given output buffer.

Parameters:

which_output	an integer of which output stream to attach the tag
abs_offset	a uint64 number of the absolute item number assicated with the tag. Can get from nitems_written.
key	the tag key as a PMT symbol
value	any PMT holding any value for the given key
srcid	optional source ID specifier; defaults to PMT_F

References gr::tag_t::key, gr::tag_t::offset, gr::tag_t::srcid, and gr::tag_t::value.

Referenced by gr::block_gateway::block__add_item_tag(), tag_source_demo::make_eob_tag(), tag_source_demo::make_sob_tag(), and tag_source_demo::make_time_tag().

void gr::block::add_item_tag	(	unsigned int	which_output,
		const tag_t &	tag
	)		`[protected]`

Adds a new tag onto the given output buffer.

Parameters:

which_output	an integer of which output stream to attach the tag
tag	the tag object to add

int gr::block::alignment ( ) const [inline]

void gr::block::consume	(	int	which_input,
		int	how_many_items
	)

Tell the scheduler how_many_items of input stream which_input were consumed.

Referenced by gr::block_gateway::block__consume().

void gr::block::consume_each ( int how_many_items )

Tell the scheduler how_many_items were consumed on each input stream.

Referenced by gr::block_gateway::block__consume_each().

block_detail_sptr gr::block::detail ( ) const [inline]

void gr::block::expand_minmax_buffer ( int port )

bool gr::block::fixed_rate ( ) const [inline]

Return true if this block has a fixed input to output rate.

If true, then fixed_rate_in_to_out and fixed_rate_out_to_in may be called.

Referenced by gr::block_gateway::block__fixed_rate().

virtual int gr::block::fixed_rate_ninput_to_noutput ( int ninput ) [virtual]

Given ninput samples, return number of output samples that will be produced. N.B. this is only defined if fixed_rate returns true. Generally speaking, you don't need to override this.

Reimplemented in gr::sync_interpolator, gr::sync_decimator, and gr::sync_block.

virtual int gr::block::fixed_rate_noutput_to_ninput ( int noutput ) [virtual]

Given noutput samples, return number of input samples required to produce noutput. N.B. this is only defined if fixed_rate returns true. Generally speaking, you don't need to override this.

Reimplemented in gr::sync_interpolator, gr::sync_decimator, and gr::sync_block.

virtual void gr::block::forecast	(	int	noutput_items,
		gr_vector_int &	ninput_items_required
	)		`[virtual]`

Estimate input requirements given output request.

Parameters:

noutput_items	number of output items to produce
ninput_items_required	number of input items required on each input stream

Given a request to product noutput_items, estimate the number of data items required on each input stream. The estimate doesn't have to be exact, but should be close.

Reimplemented in gr::tagged_stream_block, gr::sync_interpolator, atsc_bit_timing_loop, gr::sync_decimator, gr::sync_block, gr::fft::ctrlport_probe_psd_impl, atsc_equalizer, atsc_field_sync_demux, atsc_field_sync_mux, and atsc_pad.

virtual int gr::block::general_work	(	int	noutput_items,
		gr_vector_int &	ninput_items,
		gr_vector_const_void_star &	input_items,
		gr_vector_void_star &	output_items
	)		`[virtual]`

compute output items from input items

Parameters:

noutput_items	number of output items to write on each output stream
ninput_items	number of input items available on each input stream
input_items	vector of pointers to the input items, one entry per input stream
output_items	vector of pointers to the output items, one entry per output stream

Returns:: number of items actually written to each output stream, or -1 on EOF. It is OK to return a value less than noutput_items. -1 <= return value <= noutput_items

general_work must call consume or consume_each to indicate how many items were consumed on each input stream.

Reimplemented in gr::tagged_stream_block, atsc_bit_timing_loop, gr::sync_interpolator, gr::sync_decimator, gr::sync_block, atsc_field_sync_demux, and atsc_field_sync_mux.

void gr::block::get_tags_in_range	(	std::vector< tag_t > &	v,
		unsigned int	which_input,
		uint64_t	abs_start,
		uint64_t	abs_end
	)		`[protected]`

Given a [start,end), returns a vector of all tags in the range.

Range of counts is from start to end-1.

Tags are tuples of: (item count, source id, key, value)

Parameters:

v	a vector reference to return tags into
which_input	an integer of which input stream to pull from
abs_start	a uint64 count of the start of the range of interest
abs_end	a uint64 count of the end of the range of interest

Referenced by gr::block_gateway::block__get_tags_in_range(), and tag_sink_demo::work().

void gr::block::get_tags_in_range	(	std::vector< tag_t > &	v,
		unsigned int	which_input,
		uint64_t	abs_start,
		uint64_t	abs_end,
		const pmt::pmt_t &	key
	)		`[protected]`

Given a [start,end), returns a vector of all tags in the range with a given key.

Range of counts is from start to end-1.

Tags are tuples of: (item count, source id, key, value)

Parameters:

v	a vector reference to return tags into
which_input	an integer of which input stream to pull from
abs_start	a uint64 count of the start of the range of interest
abs_end	a uint64 count of the end of the range of interest
key	a PMT symbol key to filter only tags of this key

unsigned gr::block::history ( ) const [inline]

Assume block computes y_i = f(x_i, x_i-1, x_i-2, x_i-3...) History is the number of x_i's that are examined to produce one y_i. This comes in handy for FIR filters, where we use history to ensure that our input contains the appropriate "history" for the filter. History should be equal to the number of filter taps.

Referenced by gr::block_gateway::block__history().

bool gr::block::is_pc_rpc_set ( ) [inline]

Checks if this block is already exporting perf. counters to ControlPort.

bool gr::block::is_set_max_noutput_items ( )

Ask the block if the flag is or is not set to use the internal value of max_noutput_items during a call to work.

bool gr::block::is_unaligned ( ) const [inline]

int gr::block::max_noutput_items ( )

Return the maximum number of output items this block will handle during a call to work.

long gr::block::max_output_buffer ( size_t i )

Returns max buffer size on output port i.

int gr::block::min_noutput_items ( ) const [inline]

Return the minimum number of output items this block can produce during a call to work.

Should be 0 for most blocks. Useful if we're dealing with packets and the block produces one packet per call to work.

long gr::block::min_output_buffer ( size_t i )

Returns min buffer size on output port i.

uint64_t gr::block::nitems_read ( unsigned int which_input )

Return the number of items read on input stream which_input.

Referenced by gr::block_gateway::block__nitems_read(), and tag_sink_demo::work().

uint64_t gr::block::nitems_written ( unsigned int which_output )

Return the number of items written on output stream which_output.

Referenced by gr::block_gateway::block__nitems_written(), and tag_source_demo::work().

void gr::block::no_pc_rpc ( ) [inline]

If the block calls this in its constructor, it's perf. counters will not be exported.

int gr::block::output_multiple ( ) const [inline]

Referenced by gr::block_gateway::block__output_multiple().

bool gr::block::output_multiple_set ( ) const [inline]

float gr::block::pc_input_buffers_full ( int which )

Gets instantaneous fullness of which input buffer.

std::vector<float> gr::block::pc_input_buffers_full ( )

Gets instantaneous fullness of all input buffers.

float gr::block::pc_input_buffers_full_avg ( int which )

Gets average fullness of which input buffer.

std::vector<float> gr::block::pc_input_buffers_full_avg ( )

Gets average fullness of all input buffers.

float gr::block::pc_input_buffers_full_var ( int which )

Gets variance of fullness of which input buffer.

std::vector<float> gr::block::pc_input_buffers_full_var ( )

Gets variance of fullness of all input buffers.

float gr::block::pc_noutput_items ( )

Gets instantaneous noutput_items performance counter.

float gr::block::pc_noutput_items_avg ( )

Gets average noutput_items performance counter.

float gr::block::pc_noutput_items_var ( )

Gets variance of noutput_items performance counter.

float gr::block::pc_nproduced ( )

Gets instantaneous num items produced performance counter.

float gr::block::pc_nproduced_avg ( )

Gets average num items produced performance counter.

float gr::block::pc_nproduced_var ( )

Gets variance of num items produced performance counter.

float gr::block::pc_output_buffers_full ( int which )

Gets instantaneous fullness of which input buffer.

std::vector<float> gr::block::pc_output_buffers_full ( )

Gets instantaneous fullness of all output buffers.

float gr::block::pc_output_buffers_full_avg ( int which )

Gets average fullness of which input buffer.

std::vector<float> gr::block::pc_output_buffers_full_avg ( )

Gets average fullness of all output buffers.

float gr::block::pc_output_buffers_full_var ( int which )

Gets variance of fullness of which input buffer.

std::vector<float> gr::block::pc_output_buffers_full_var ( )

Gets variance of fullness of all output buffers.

float gr::block::pc_work_time ( )

Gets instantaneous clock cycles spent in work.

float gr::block::pc_work_time_avg ( )

Gets average clock cycles spent in work.

float gr::block::pc_work_time_var ( )

Gets average clock cycles spent in work.

std::vector<int> gr::block::processor_affinity ( ) [inline, virtual]

Get the current processor affinity.

Reimplemented from gr::basic_block.

void gr::block::produce	(	int	which_output,
		int	how_many_items
	)

Tell the scheduler how_many_items were produced on output stream which_output.

If the block's general_work method calls produce, general_work must return WORK_CALLED_PRODUCE.

Referenced by gr::block_gateway::block__produce().

double gr::block::relative_rate ( ) const [inline]

return the approximate output rate / input rate

Referenced by gr::block_gateway::block__relative_rate().

void gr::block::remove_item_tag	(	unsigned int	which_input,
		uint64_t	abs_offset,
		const pmt::pmt_t &	key,
		const pmt::pmt_t &	value,
		const pmt::pmt_t &	srcid = `pmt::PMT_F`
	)		`[inline, protected]`

Removes a tag from the given input buffer.

Parameters:

which_input	an integer of which input stream to remove the tag from
abs_offset	a uint64 number of the absolute item number assicated with the tag. Can get from nitems_written.
key	the tag key as a PMT symbol
value	any PMT holding any value for the given key
srcid	optional source ID specifier; defaults to PMT_F

If no such tag is found, does nothing.

References gr::tag_t::key, gr::tag_t::offset, gr::tag_t::srcid, and gr::tag_t::value.

void gr::block::remove_item_tag	(	unsigned int	which_input,
		const tag_t &	tag
	)		`[protected]`

Removes a tag from the given input buffer.

If no such tag is found, does nothing.

Parameters:

which_input	an integer of which input stream to remove the tag from
tag	the tag object to remove

void gr::block::reset_perf_counters ( )

Resets the performance counters.

void gr::block::set_alignment ( int multiple )

Constrains buffers to work on a set item alignment (for SIMD)

set_alignment_multiple causes the scheduler to ensure that the noutput_items argument passed to forecast and general_work will be an integer multiple of

Parameters:

multiple The default value is 1.

This control is similar to the output_multiple setting, except that if the number of items passed to the block is less than the output_multiple, this value is ignored and the block can produce like normal. The d_unaligned value is set to the number of items the block is off by. In the next call to general_work, the noutput_items is set to d_unaligned or less until d_unaligned==0. The buffers are now aligned again and the aligned calls can be performed again.

void gr::block::set_detail ( block_detail_sptr detail ) [inline]

void gr::block::set_fixed_rate ( bool fixed_rate ) [inline, protected]

Referenced by gr::block_gateway::block__set_fixed_rate().

void gr::block::set_history ( unsigned history ) [inline]

Referenced by gr::block_gateway::block__set_history().

void gr::block::set_is_unaligned ( bool u )

void gr::block::set_max_noutput_items ( int m )

Set the maximum number of output items this block will handle during a call to work.

Parameters:

m	the maximum noutput_items this block will handle.

void gr::block::set_max_output_buffer ( long max_output_buffer )

Sets max buffer size on all output ports.

void gr::block::set_max_output_buffer	(	int	port,
		long	max_output_buffer
	)

Sets max buffer size on output port port.

void gr::block::set_min_noutput_items ( int m ) [inline]

Set the minimum number of output items this block can produce during a call to work.

Parameters:

m	the minimum noutput_items this block can produce.

void gr::block::set_min_output_buffer ( long min_output_buffer )

Sets min buffer size on all output ports.

void gr::block::set_min_output_buffer	(	int	port,
		long	min_output_buffer
	)

Sets min buffer size on output port port.

void gr::block::set_output_multiple ( int multiple )

Constrain the noutput_items argument passed to forecast and general_work.

set_output_multiple causes the scheduler to ensure that the noutput_items argument passed to forecast and general_work will be an integer multiple of

Parameters:

multiple The default value of output multiple is 1.

Referenced by gr::block_gateway::block__set_output_multiple().

void gr::block::set_processor_affinity ( const std::vector< int > & mask ) [virtual]

Set the thread's affinity to processor core n.

Parameters:

mask	a vector of ints of the core numbers available to this block.

Reimplemented from gr::basic_block.

void gr::block::set_relative_rate ( double relative_rate )

Set the approximate output rate / input rate.

Provide a hint to the buffer allocator and scheduler. The default relative_rate is 1.0

decimators have relative_rates < 1.0 interpolators have relative_rates > 1.0

Referenced by gr::block_gateway::block__set_relative_rate().

void gr::block::set_tag_propagation_policy ( tag_propagation_policy_t p )

Set the policy by the scheduler to determine how tags are moved downstream.

Referenced by gr::block_gateway::block__set_tag_propagation_policy().

int gr::block::set_thread_priority ( int priority )

Set the current thread priority.

void gr::block::set_unaligned ( int na )

void gr::block::setup_pc_rpc ( )

Sets up export of perf. counters to ControlPort. Only called by the scheduler.

virtual bool gr::block::start ( ) [virtual]

Called to enable drivers, etc for i/o devices.

This allows a block to enable an associated driver to begin transfering data just before we start to execute the scheduler. The end result is that this reduces latency in the pipeline when dealing with audio devices, usrps, etc.

Reimplemented in gr::blocks::probe_rate.

virtual bool gr::block::stop ( ) [virtual]

Called to disable drivers, etc for i/o devices.

Reimplemented in gr::blocks::probe_rate.

tag_propagation_policy_t gr::block::tag_propagation_policy ( )

Asks for the policy used by the scheduler to moved tags downstream.

Referenced by gr::block_gateway::block__tag_propagation_policy().

int gr::block::thread_priority ( )

Get the current thread priority stored.

int gr::block::unaligned ( ) const [inline]

void gr::block::unset_max_noutput_items ( )

Clear the switch for using the max_noutput_items value of this block.

When is_set_max_noutput_items() returns 'true', the scheduler will use the value returned by max_noutput_items() to limit the size of the number of items possible for this block's work function. If is_set_max_notput_items() returns 'false', then the scheduler ignores the internal value and uses the value set globally in the top_block.

Use this value to clear the 'is_set' flag so the scheduler will ignore this. Use the set_max_noutput_items(m) call to both set a new value for max_noutput_items and to reenable its use in the scheduler.

void gr::block::unset_processor_affinity ( ) [virtual]

Remove processor affinity to a specific core.

Reimplemented from gr::basic_block.